This study material series has been designed and prepared in such a way that it acts as a joint book for NEET and the students of 11th & 12th classes From a long time a need was felt to prepare the study material for the intermediate students of classes 11th & 12th especially a joint study material for the students of classes 11th 12th and NEET. This was the urgent need so that students can prepare well for the NEET from very beginning. Although a lot of study materials are available for the students, but there was a need for a study material to inculcate the concepts and ideas from text books prescribed by NCERT. So care has been taken to give a due weightage to the concepts and themes of text books so that students may perform well in future competitive exams like NEET besides this book equally benefits the students in their preparatory classes of NEET. The bold or underlined words except headings or sub-headings are important points to remember for NEET entrance exam. Almost all the previous year questions of NEET come from such bold headings. Diagrams have been taken from diverse and authentic sources to make the process of understanding easier. Care has been taken to avoid the unimportant and unnecessary points in order to make the notes brief and easy to memorize, at the same time a great care has been taken not to avoid the important and necessary points. Long questions have been fragmented so that each and every concept is properly understood and at the same time a short note gets prepared for the sub-headings automatically. Although due care has been taken to minimize the errors, but at the same time the appearance of errors in the study material cannot be ruled out. Therefore, i will be highly thankful for you if you write me about the errors which have crept in the study material. Don't forget to mention your name and topic where you spot an error. Will surely try to rectify the same in the coming editions, In sha Allah.